Convert Thermochemical BTU per pound per degree Fahrenheit to Millijoule per kilogram kelvin
Convert Thermochemical BTU per pound per degree Fahrenheit (BTU(th)/(lb·°F)) to Millijoule per kilogram kelvin (mJ/(kg·K)) instantly and accurately.
Conversion Formula
mJ/(kg·K) = BTU(th)/(lb·°F) × 4184000
About Thermochemical BTU per pound per degree Fahrenheit
The thermochemical BTU per pound per degree Fahrenheit (BTU(th)/(lb·°F)) equals exactly 4184 J/(kg·K) (derived: 1 BTU(th) = 1054.350264 J; /lb/°F). Numerically identical to cal(th)/(g·°C) because both are defined via the thermochemical calorie. Used in older American thermodynamic tables. Water ≈1 BTU(th)/(lb·°F). 1 BTU(th)/(lb·°F) = 4184 J/(kg·K).
About Millijoule per kilogram kelvin
The millijoule per kilogram kelvin (mJ/(kg·K)) equals exactly 10⁻³ J/(kg·K). Used for very light gases at extreme conditions and in precision calorimetry where tiny heat capacities must be measured. Rarely encountered in standard engineering but useful when expressing specific heat of dilute aerosols or highly rarefied media. 1 mJ/(kg·K) = 10⁻³ J/(kg·K).
Quick Reference Table
| Thermochemical BTU per pound per degree Fahrenheit (BTU(th)/(lb·°F)) | Millijoule per kilogram kelvin (mJ/(kg·K)) |
|---|---|
| 1 BTU(th)/(lb·°F) | 4184000 mJ/(kg·K) |
| 2 BTU(th)/(lb·°F) | 8368000 mJ/(kg·K) |
| 5 BTU(th)/(lb·°F) | 20920000 mJ/(kg·K) |
| 10 BTU(th)/(lb·°F) | 41840000 mJ/(kg·K) |
| 25 BTU(th)/(lb·°F) | 104600000 mJ/(kg·K) |
| 50 BTU(th)/(lb·°F) | 209200000 mJ/(kg·K) |
| 100 BTU(th)/(lb·°F) | 418400000 mJ/(kg·K) |